A/2019 G2
ephemeris	date	magn	radius	delta	ra	dec	elong	phase	PA
Perihelion	6 Dec 2019	20.7	2.311 AU	1.927 AU	10h59m	+33°35'	99.9°	24.8°	290°
Nearest approach	9 Jan 2020	19.8	2.344 AU	1.466 AU	08h19m	+54°51'	145.5°	13.7°	204°
Today	17 Mar 2026	28.9	17.029 AU	17.993 AU	23h45m	-15°11'	13.8°	0.8°	182°

The interactive orbit chart above shows the comet's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below. (Left-click and drag to rotate the view; Right-click and drag to move the view; Use scroll wheel to zoom in our out.)

Light curve

The light curve chart below shows the estimated development of the comet's magnitude. Blue and black dots are visual and photometric CCD observations from COBS. The displayed light curve is calculated under the assumption that the object remains inactive. (H=16.30; G=.15).

Charts

The all-sky chart below shows the path of the comet over the same period as the light curve. The comet's current position is marked yellow.

The following chart shows the short-term path of the comet in a field of view that is optimized for (~10x50) binoculars and finderscopes.

Orbital elements

The orbital elements of A/2019 G2 are:

    e (Eccentricity)                : 0.9943400
    q (Perihelion distance)         : 2.3106730
    i (Inclination)                 : 159.27290
    Ω (Longitude of ascending node) : 208.28190
    ω (Argument of perihelion)      : 82.88050
    L (Longitude of perihelion)     : 125.88850
    B (Latitude of perihelion)      : 20.56003
    T (Time of perihelion passage)  : 2458823.61260
    P (Orbital period in years)     : 8248.65

    Epoch                           : 2026 Mar 16
    Reference                       : MPEC 2026-E44

    Classification(s):              : Nearly isotropic; Returning (a < 10000 AU); External (P > 200 years)

Ephemerides

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-03-16 00:00 UT   23 44 48.4   -15 13 28    17.987   17.021   13.3    0.8   177   28.9 
2026-03-17 00:00 UT   23 44 59.6   -15 12 27    17.991   17.026   13.6    0.8   180   28.9 
2026-03-17 12:01 UT   23 45 05.3   -15 11 57    17.993   17.029   13.8    0.8   182   28.9 
2026-03-18 00:00 UT   23 45 10.9   -15 11 28    17.995   17.032   14.0    0.8   184   28.9 
2026-03-19 00:00 UT   23 45 22.1   -15 10 29    17.998   17.037   14.5    0.8   187   28.9 
2026-03-20 00:00 UT   23 45 33.4   -15 09 30    18.002   17.042   15.0    0.9   191   28.9 
2026-03-21 00:00 UT   23 45 44.6   -15 08 33    18.005   17.048   15.6    0.9   193   28.9 
2026-03-22 00:00 UT   23 45 55.8   -15 07 37    18.008   17.053   16.1    0.9   196   28.9 
2026-03-23 00:00 UT   23 46 06.9   -15 06 41    18.010   17.059   16.8    1.0   199   28.9 
2026-03-24 00:00 UT   23 46 18.1   -15 05 47    18.012   17.064   17.4    1.0   201   28.9 
2026-03-25 00:00 UT   23 46 29.2   -15 04 53    18.014   17.070   18.1    1.0   203   28.9 
2026-03-26 00:00 UT   23 46 40.3   -15 04 00    18.016   17.075   18.8    1.1   205   28.9 
2026-03-27 00:00 UT   23 46 51.3   -15 03 08    18.017   17.080   19.5    1.1   207   28.9 

    Terminology:
            
    delta:  distance between comet and earth in AU
    radius: distance between comet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-comet)    
    phase:  phase angle in degrees (angle sun-comet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km      
    

Orbital elements usually provided by the MPC (Minor Planet Center).
Observations contributed by observers worldwide, via COBS (Comet Observation Database) or the MPC (Minor Planet Center)
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.